package com.ghck.server.utils;

import java.net.InetAddress;
import java.net.UnknownHostException;
import java.security.Principal;

import javax.servlet.http.HttpServletRequest;

import org.springframework.core.env.Environment;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;

import com.ghck.server.security.AjkUserDetails;

public class AjkUtil {
	
	private static Environment env;
	
	public static String PINGXX_APP_ID = null;
	
	public void setEnv(Environment env) {
		AjkUtil.env = env;
	}
	/**
	 * Get GUID.
	 * 
	 * @return GUID
	 */
	 public static String GetGUID(){		
		return java.util.UUID.randomUUID().toString();
	}
	 
	/**
	 * 获取文件的扩展名 
	 * @param fileName
	 * @return
	 */
	public static String getFileExtension(String fileName){
		if(fileName!=null && !"".equals(fileName.trim())&&fileName.contains(".")){
			return fileName.substring(fileName.lastIndexOf("."));
		}
		return "";
	}
	
	public static AjkUserDetails getUserDetails(Principal principal){
		AjkUserDetails user = null;
		if(principal instanceof UsernamePasswordAuthenticationToken){
			UsernamePasswordAuthenticationToken pro = (UsernamePasswordAuthenticationToken) principal;
			if(pro!=null && pro.getDetails()!=null && pro.getDetails() instanceof AjkUserDetails){
				user =  (AjkUserDetails) pro.getDetails();
			}
		}
		return user;
	}
	
	public static String getClientIPAddress(HttpServletRequest request) {
    	String ipAddress = null;
		ipAddress = request.getHeader("x-forwarded-for");
		if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
			ipAddress = request.getHeader("Proxy-Client-IP");
		}
		if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
			ipAddress = request.getHeader("WL-Proxy-Client-IP");
		}
		if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
			ipAddress = request.getRemoteAddr();
			if (ipAddress.equals("127.0.0.1")) {
				// 根据网卡取本机配置的IP
				InetAddress inet = null;
				try {
					inet = InetAddress.getLocalHost();
				} catch (UnknownHostException e) {
					e.printStackTrace();
				}
				ipAddress = inet.getHostAddress();
			}
		}
		// 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
		if (ipAddress != null && ipAddress.length() > 15) { // "***.***.***.***".length()
															// = 15
			if (ipAddress.indexOf(",") > 0) {
				ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
			}
		}
		if(ipAddress.equals("0:0:0:0:0:0:0:1")){
			ipAddress = "127.0.0.1";
		}
		return ipAddress;
    }
}
